Several websites (Yahooligans, Hollywood.com, Licensing.disney.com,...) mention the involvement of Tom Waits in the upcoming movie The Chronicles of Narnia: The Lion, The Witch and The Wardrobe, based on C.S. Lewis' books.
This Disney production by director Andrew Adamson should hit theaters on December 13. Amazon.com has the soundtrack listed but provides no further details, except that the cd by Harry Gregson-Williams (as well as a limited edition version) will available on the same date.
Adamson also directed Shrek and Shrek 2, so a Tom Waits connection is not totally unfeasible.
UPDATE: As more details - like on Soundtrack.net and Take2.com - about are surfacing, it seems more and more clear that Tom Waits has nothing to do with the soundtrack. Even his participation in the movie looks doubtful: apparently a few actors were contacted to provide voices for animated characters in the movie, but several of them were later replaced by others. It is very possible this was the case with Tom Waits as well.